/*
Copyright 2022 Huawei Cloud Computing Technologies Co., Ltd.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package netstorage

import (
	"time"

	"github.com/influxdata/influxdb/pkg/limiter"
)

const (
	tsspVersion = "1.0.0"
)

type EngineOptions struct {
	Version string
	// Limits the concurrent number of TSM files that can be loaded at once.
	OpenLimiter limiter.Fixed

	ImmTableMaxMemoryPercentage int

	// WriteColdDuration is the length of time at which the engine will snapshot the mutable
	WriteColdDuration time.Duration

	// ShardMutableSizeLimit is the maximum size a shard's cache can reach before it starts rejecting writes.
	ShardMutableSizeLimit int64

	// NodeMutableSizeLimit is the maximum size a node's cache can reach before it starts rejecting writes.
	NodeMutableSizeLimit int64

	// MaxWriteHangTime is the maximum time to hang for data write to store if node mem of mem is not enough
	MaxWriteHangTime time.Duration

	// Enable read from mem data, include mutable and snapshot table, default value is true
	MemDataReadEnabled bool

	FullCompactColdDuration  time.Duration
	MaxConcurrentCompactions int
	MaxFullCompactions       int
	CompactThroughput        int64
	CompactThroughputBurst   int64
	CompactRecovery          bool
	SnapshotThroughput       int64
	SnapshotThroughputBurst  int64

	// WalSyncInterval is the interval of wal file sync
	WalEnabled        bool
	WalSyncInterval   time.Duration
	WalReplayParallel bool
	WalReplayAsync    bool

	// Immutable config
	ReadCacheLimit   uint64
	CacheDataBlock   bool
	CacheMetaBlock   bool
	EnableMmapRead   bool
	CompactionMethod int // 0:auto, 1:stream, 2: non-stream
	OpenShardLimit   int

	DownSampleWriteDrop          bool
	MaxDownSampleTaskConcurrency int
}

func NewEngineOptions() EngineOptions {
	return EngineOptions{
		Version: tsspVersion,
	}
}
